Đề bài

Cho \(\int\limits_0^3 {f\left( x \right)dx = 5} \) và \(\int\limits_0^3 {g\left( x \right)dx = 2} \). Tính:

a) \(\int\limits_0^3 {\left[ {f\left( x \right) + g\left( x \right)} \right]dx} \);

b) \(\int\limits_0^3 {\left[ {f\left( x \right) - g\left( x \right)} \right]dx} \);

c) \(\int\limits_0^3 {3f\left( x \right)dx} \);

d) \(\int\limits_0^3 {\left[ {2f\left( x \right) - 3g\left( x \right)} \right]dx} \).